Castletown Weather in September

September in Castletown brings moderate temperatures, with highs of 16°C (61°F) and nights dropping to 13°C (55°F). Rainfall is on the higher side this month, averaging around 92 mm (3.6 in), so keep a rain jacket handy.

Rainfall in Castletown in September

Based on our climate data of the past 30 years, about 16 days of rain are anticipated, with 92 mm (3.6 in) on average. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Castletown in September

Temperatures in Castletown in September top out at 16°C (61°F) and drop to 13°C (55°F) overnight. The difference between afternoon and evening temperatures is usually noticeable. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Castletown's climate page.

Castletown Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 16°C (61°F)  

Chance of Rain 53%  

Precipitation 92 mm (3.6 in)  

Rainy days 16 days  

What to Wear in Castletown in September

For Castletown in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Castletown in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Castletown's climate page.

More climate data for Castletown

Temperature Rainfall

See the full Castletown climate overview or explore weather in the United Kingdom.